What should a child know after reception year??

[Poko]

I am new to this messaging so not good on the language. Just wanted to ask if anyone knows a website or knows what a child who has attended reception year (at 4-5 years) should know. numbers until what / should they be able to write anything, read anything. I am living overseas and hoping to return to the UK shortly, unless attending private school children are not expected to read until 7 years and at 4years have just learnt 1- 20. any help would be welcome, don't want to be too far behind when we return